I think otherwise simply because that's what the data says.

I was talking to a con artist once who took the point even further. He said smart people are actually easier to con for a few reasons.

The smarter a person is, the better they are at working out a chain of reasoning that can "prove" the con isn't a con. Since a con is appealing to human emotion, not logic, you can make a smart person want to believe the con so much that they'll work out the "proof" that it's legit all by themselves.